Dodge RAM TRUCK 1500 1995 Service Manual page 1593

21 - 312 NV 021 PTO ADAPTER
B R
ITEM TORQUE
A 2-3 m m (15-27 in. lbs.)
B 10-12 m m (90-110 in. lbs.)
SPEEDOMETER
ADAPTER
ADAPTER
O-RING
VEHICLE
SPEED
SENSOR
SPEEDOMETER
PINION
J9321-385
Fig. 8 Speedometer Components
Inoperative
If the adapter will not drive a PTO accessory, the
most probable causes are:
• PTO accessory not compatible with adapter (no
gear mesh)
• PTO accessory loose, or misaligned
• PTO accessory damaged/inoperative
• adapter shift lever or shift rod disconnected
® transmission not in drive range
Noisy Operation
The most probable causes of noise are:
• low lubricant level
• PTO accessory loose, misaligned, or not compatible
• misadjusted shift rod
• engine/transmission mounts loose/damaged
• loose linkage or adapter assembly bolts
• output bearing snap ring not seated in bearing
groove
• damaged input/output bearing
© worn/damaged shift fork, sleeve, or input gear
• loose/missing poppet, spring, or screw
• PTO gear teeth damaged
Hard Shifting
The most probable causes of a hard shift condition
are:
• incorrect shift technique
• transmission and adapter shaft speeds not matched
• PTO accessory misaligned, or loose
• low lubricant level (leak or underfilled)
• shift rod loose or misadjusted
® shift lever nut loose or missing
• engine/transmission mounts loose/damaged
• adapter shift fork or sleeve damaged
Fluid Leaks
Fluid leaks from the adapter will generally be from
the vent, front/rear seal, front case-to-rear case joint,
poppet plunger screw, or adapter-to-transmission joint.
A leak at the front end of the adapter may not al­
ways be from the input bearing retainer seal. Check
front leaks carefully as the actual leak source may be
the transmission.
SHIFT LINKAGE ADJUSTMENT
(1) Place adapter floor shift lever in D position.
(2) Raise vehicle.
(3) Loosen locknut on shift rod.
(4) Verify that adapter shift lever is in D position.
(5) Tighten shift rod locknut and lower vehicle.
SPEEDOMETER SERVICE
(1) Raise vehicle.
(2) Disconnect wires from vehicle speed sensor.
(3) Remove adapter clamp and screw (Fig. 8).
(4) Remove speed sensor and speedometer adapter
as assembly.
(5) Remove speed sensor retaining screw and re­
move sensor from adapter.
(6) Remove speedometer pinion from adapter.
(7) Inspect sensor and adapter O-rings (Fig. 8). Re­
move and discard O-rings if worn or damaged.
(8) Inspect terminal pins in speed sensor. Clean
pins with Mopar electrical spray cleaner if dirty or
oxidized. Replace sensor if faulty, or pins are loose,
severely corroded, or damaged.